On command

Taking a deep breath you confess to your aunt a few new things you have found, " aunt Ava it seems what ever is going on is making some interesting changes and not just with my cock ". Asking what changes you explain what happened with Nadia earlier and the whole smelling her thing. " So you think you can smell if a woman is fertile is what your saying anything else you want to share with me".

" Well funny you should ask" and without further prompt drop the baggy pants to the floor. " Oh my god Timothy I do not need to see your dick, what the fuck is it doing oh my that is big". Having found after going at it with Gabby you could make you dick go hard on command and go from its normal size of 8inches to a stupid 20+ inches at will. Your aunt is now watching as it goes up and down growing and decreasing in size. " Ok that just happened so your the first man on earth who can actually control his dick nice to know". Trying hard not to laugh at your aunt as her face is a picture, you move closer to your aunt who begins to back away. "Now Timothy no need to do anything silly I have seen enough now thank you".

Encountering the wall behind her your aunt is currently fighting a fierce internal battle, seeing your cock do what it is doing has made her very horney and a large part of her wants to have a go on it whilst the other side is trying to reason it out saying it is wrong and all that stuff. Moving closer you inhale your aunts scent and find she does not smell like Nadia did but you have found everyone has their own different scent. Seeing you aunt bit her lips as she stares at your cock, taking this as a sign you kiss her and her resolve breaks, your aunt kisses you back with passion whilst you pull her closer.

Feeling your cock pressing up against her stomach your aunt reaches down and undoes her pants letting them fall to the floor and kicking them away. Stopping kissing you your aunt looks you in the eyes, " I need you to be one hundred percent honest with me Tim I saw you smelling me or what ever it is you do ok is it possible I smell like Nadia does or did or what ever it is that lets you know a woman is fertile, I do not want to get knocked up by you Ok mister".

Nodding you sniff her again to be sure, " you do not have the scent of someone I can knock up aunt Ava it is a very distinctive scent on top of what the person normally smells like". Smiling your aunt guides the head of your cock in to her pussy and tells you to pick her up. Getting what she wants you grab her by the butt and lift her off the ground allowing her to wrap her legs around you and slowly sink on to you cock. Orgasming just from your cock entering her your aunt struggles to contain the cries she is emitting. Finding you have reached far enough inside of your aunt you lean close to her and whisper. " Are you ready for the next size up aunt Ava" , looking at you she has thought this was the next size up already and all of a sudden feels your cock begin to get bigger.

Progressively getting bigger in both length and girth your aunt can only groan as your cock probes deeper inside of her but strangely you find the going fairly easily not encountering any trouble moving past her cervix and entering her womb. Orgasming hard from your cock entering her womb she looks down to see the bulge of your cock moving inside of her and orgasm instantly again after seeing that " god fuck me Tim fuck like you fucked the others fill me with all that cum".

Pumping away faster and faster at your aunts pussy you reach the end and dump a hot heavy load in to your aunts womb filling it beyond capacity and watch as her belly slowly expands. Orgasming as this happens you aunt can only groan as her belly grows, finishing cumming inside of her your aunt tells you to pull out and put her down. Doing so your aunt removes her top and staggers to the railing with cum pouring out of her pussy, " get your butt over here young man you know I have not had the virus so get ready to milk me boy as we know what is about to happen after your last upgrade thing, enhancement what ever the fuck it is since the last time we fucked".